The organisation picked up a quite odd case this time around: Multiple dead bodies had appeared around the city over the course of a few months. All of them have been turned to stone, their skin dried out and their throat filled with sand. So far, no one had been able to get any hints or information about who or what did it. As the numbers of victims increased, the organisation decided to entrust the case to a more experienced hunter: Pat Kenson This is the story of the 50-year-old, smoking addicted hunter Pat and his insecure apprentice Sam trying to solve the mystery of the stone killer and stumbling across the biggest case of their lives. A case that forces them to grow together as well as confronts them with their pasts.